Rotary drill.



No. 717,630. 1 PATENTED JAN. 6, 1903.

'L E. SEED L L. HARPER. `ROTARY DRILL.

APPLIUATION HLM) FEB. a, 190m no MODEL.

UNITE STATES LEONARD F. SEED AND LEE HARPER, OF MILLET, TEXAS.

ROTARY DRlLL.

SPECIFICATION forming part of Letters Patent No. 717,630, dated January6, 1903.

Application iiled February 3, 1902. Serial No. 92,469. (No model.)

To @ZZ whom, t may concern,.- v

Beit known that we, LEONARD F. SEED and LEE HARPER, citizens of theUnited States, residing at Millet, in the county of Lasalle and State ofTexas, have invented a new and useful Rotary Drill, of which thefollowing is a specilication.

Our invention is an improvement in well boring machines, and relatesparticularly to the class known as Lrotary drills, and the objectthereof is to provide a device in which a continuous feed is suppliedsimultaneously with the rotation of the pipe.

Another object of our invention is to provide a gripping device forpositively holding the pipe while it is being rotated, which will at thesame time permit of the pipe being dropped into the shaft; and withthese and other objects in view our invention consists in certaindetails of construction and novelties of combination, as will be fullydescribed in the following speciiication,and pointed out in` the claims,reference being had to the drawings, in which- Figure l is a sideelevation of our improved drill. Fig. 2 is a detail section taken abouton the line 2 2 of Fig. l, one of the sliding heads being removed. Fig.3 is a cross-section on about the line 3 3 of Fig; 2. Fig. Il is adetail view of one of the feed-rollers, and Figs. 5, 6, and 7 are detailviews of construction.

In the drawings, A represents a framing upon which is suitably mounted aplate A', having a raceway arranged centrally therein, in which arepositioned antifriction-balls, upon which rests a large cog-wheel B,that is driven by a pinion C, which may derive its power from anysuitablesource. Thegear B is provided with a central aperture, and uponeitherside thereof are cast sockets B', in which are held the lower endsof verticallyextending U-shaped standards D, in which are slidably heldarins E', projecting laterally from a circular plate or disk E, which isprovided with a series of depressions Ethat communicate with each otherand which terminate at the center of the plate in an opening EX, thatextends entirely through the plate, as shown. Working in each of thesedepressions or guides is a sliding head F, each having its forwardorinner end terminating in arms F', in which are journaled feed rollersor disks G. These sliding heads are preferably of the same width as thedepression E2 and are retained therein by` means of plates E3, which arearranged uponV the top of the disk and extend over and upon the slidingheads, thereby securely holding the heads against vertical movement andat the same timerallowing a horizontal movement thereof. The heads arecontrolled by screws H, that are rotatably connected to the said headsand work through threaded openings in the edge of the plate, as shown.the screws having suitable hand wheels H', 4held upon their outer ends,by which they are controlled.

One face of the arms E is provided with suitable antifrict-ion-rollersl, that may be held in position by any suitable means, but preferably bya slotted plate I. These rollers, however, are only arranged upon theside of the arms that contact with the standards, which is caused by therotation of the gear, and. by this arrangement the friction between thearms and standards is reduced to a minimum.

In practice the pipe P, used for holding the drill, is clamped betweenthe rollers G when the plate is in an elevated position. Power is thenapplied to the pinion which rotates the gear, which lcarries the platewith it, and by having the pipe securely clamped to the plate causes italso to revolve simultaneously with the dropping or feeding thereof, andin practice we prefer to arrange springs S in the lower ends of thestandards to prevent jarring when the plate reaches its lowermostposition.

It will thus be seen that we provide a very simple and economical formof feed device in which the old form ofV wooden clamps for droppingisentirely dispensed with. We also rollers, so as to insure a positivegrip upon the pipe.

Having thus fully described our invention, what we claim as new, anddesire to secure by Letters Patent of the United States, isf- 1. Adevice of the kind described, the combination of a gear having socketsformed thereon, andan aperture formed therein, standards held by thesaid sockets, cushion-springs arranged in the lower end of thestandards,

prefer to flute or ronghen the face of the feeda vertically movableplate guided by the standards,sliding heads arranged in the plate, andhaving feed-rollers journaled in their forward ends, screws operating inthe plate and having their forward ends connected to the said heads andtheir outer ends provided With hand-wheels, and means for revolving theplate substantially as shown and described.

2. The combination of a frame havin-g a gear revolubly mounted thereon,a pinion meshing With the gear, sockets formed on the gear, standardsheld by the said sockets and having cushion-springs arranged therein, aplate having arms projecting therefrom and which are adapted to move inthe standards, the said plate having openings arranged therein, slidingheads operating in the openings, feedrollers carried by the heads,screws for operating the heads, and means for revolving the plate,substantially as shown and described. 3. In a device of the kinddescribed, the combination of a frame, a gear revolubly mounted thereonand having an aperture arranged therein, a pinion arranged forengagement with the gear, standards carried by the gear, a plate havingarms that are arranged to operate in the standards, the said platehaving an opening arranged centrally therein and into which communicatea series of depressions formed in the plate, sliding heads carryingrollers operating in the depressions, and means for operating the saidsliding heads, substantially as shown and described. 4. In a device ofthe kind described the combination of aframe, agear mountedthereon,'channelguides projecting from the gear, springs held in thelower end of the said channel-guides, a plate having arms that areprovided With friction-rollers and which are arranged to travel Withinthe said guides, the said plate having a centrally-arranged opening intowhich a series of depressions formed in the plate communicate, the saiddepressions forming guides for the sliding heads, supplemental platesheld upon the firstnamed plate, at the sides of the depressions andarranged for retaining the heads in position, and means for operatingthe heads, substantially as shown and described.

LEONARD F. SEED. LEE HARPER.

Witnesses:

G. 1I. KRUGGs, C. B. BURWELL.

